Meth is also a schedule 2 drug and is illegal. In some rare cases, the meth has medicinal uses with a prescription, but those uses are tightly regulated.
Opiate
Opiates are processed from the opium poppy plant and the opiate base is used to create illicit drug like heroin, as well as morphine.
Opiates are a relaxer. They reduce the pain and increase euphoria. The versions of opiates (heroin and opium) can be smoked, snorted, or injected. Addiction to opiates is very strong!
THC
THC is found in the marijuana plant and in a synthetic form as Marinol. The users of THC either smoke the dried buds and hash, or eat the edible baked goods.
Marijuana is mostly smoked to achieve a feeling of relaxation and euphoria. Side effects are anxiety.
Even though marijuana does not have a strong dependence factor, if the user uses it for a long period can result in negative effects. This drug is schedule 1 drug.
Phencyclidine
Phencyclidine is a synthetic chemical made in illegal laboratories or stolen from veterinary sources.
The form of this drug is either like powder or a clear yellowish liquid and users can smoke it, inject it, snort it, or take in the drug in a different ways.
This drug is used recreational and is inducing hallucinations and dangerous experiences. It is considered a Schedule 2 substance with no legal use for humans.